1940 All-Ireland Senior Football Championship

The 1940 All-Ireland Senior Football Championship was the 54th staging of Ireland's premier Gaelic football knock-out competition. Kerry won their fourteenth All-Ireland title, putting them level with in the all-time standings.

Leinster Championship format change
A reduced amount of counties in the championship of 1940.

Munster Championship format change
There is normal format of 2 Quarter-finals vs 2 Semi-finals in place.

All Ireland semi-finals system
The All-Ireland Senior Football Championship was run on a provincial basis as usual in rotation of every 3rd year, with the four winners from Connacht, Leinster, Munster and Ulster advancing to the All-Ireland semi-finals. The draw for these games was as follows:
 * Munster V. Ulster
 * Connacht V. Leinster

Miscellaneous

 * Meath retain the Leinster title for the first time in history.
 * The All Ireland semi-final between Galway and Meath was their first championship meeting.
 * Kerry are now level with Dublin for the most All Ireland titles.